NOTICE: All of the following instructions can no longer be followed as MIPS Technologies removed the sde-for-linux directory from their FTP site.

MIPS SDE Download and Install

The current SDE release is 6.05.00, and is
based on GCC 3.4, but with many local bug fixes and
improvements. Take care when upgrading from GCC 2.9x or if downgrading
from GCC 4.x, because there are compatibility issues - see GCC for details.

Cross Toolchain

The cross toolchain can only be used to cross compile a Linux/MIPS kernel, it cannot be used to build Linux/MIPS applications and shared libraries without some additional cross building infrastructure, such as listed in Toolchains. The Linux/386 cross toolchain is available as a single file, in RPM format:

Native Toolchain

The native toolchain can be used to build the Linux kernel on a Linux/MIPS host, and can also build applications and shared libraries.
The Linux/MIPS native toolchain is organised into separate RPM files, mirroring the RedHat 7.x toolchain organisation.

Installation Procedure

To avoid conflicts when installing the native toolchain
only, you need to uninstall any old compiler and its support
packages. This is most easily done by running the install-native.sh
shell script listed above, which must be in the same directory as the
rpm files. It will allow you to save your old toolchain package first,
in case you need to uninstall SDE and revert.

The cross toolchain is installed simply using the normal rpm command,
for example:

# rpm -Uv mipsel-sdelinux-v6.05.00-4.i386.rpm

MTUK would like to hear how well it worked, so contact them on sde@mips.com.